Switch to exponential wait, fixes #106

Author: dbosk

semanticscholar/ApiRequester.py

@@ -6,7 +6,9 @@
 
 import httpx
 from tenacity import retry as rerun
-from tenacity import retry_if_exception_type, stop_after_attempt, wait_fixed
+from tenacity import retry_if_exception_type, \
+                     stop_after_attempt, \
+                     wait_exponential
 
 from semanticscholar.SemanticScholarException import (
     BadQueryParametersException, GatewayTimeoutException,
@@ -94,7 +96,7 @@ async def get_data_async(
             )(self, url, parameters, headers, payload)
 
     @rerun(
-        wait=wait_fixed(30),
+        wait=wait_exponential(min=5),
         retry=retry_if_exception_type(ConnectionRefusedError),
         stop=stop_after_attempt(10)
     )